Design of engine valves operation system, auto-valve system (AVS)

ABSTRACT

A new design of engine valves operation system provides more accuracy in timing and increase in efficiency of engine. With the pipe structure over the engine, valves can be operated by the exhaust gases after combustion within the cylinders. After combustion, an opening near bottom limit of piston of one cylinder routes some of the exhaust gases to open gas intake valve of prior cylinder and exhaust valve of its own. This way the vested combustion energy would be in use. On the other hand, a portion of energy directly from the engine crank shaft to operate engine valves in an ordinary systems would be saved and therefore results in increase of engine performance. Since there are no need timing belt, cam shaft and pulleys in new operation system, the loss powers due to belt tightness and friction of pulleys, and cam shaft would be directed to the wheels adding more Horse Power. To start the engine, one additional intake valve and one additional exhaust valve are added to the first cylinder. These valves operated by starter motor at start-up of engine, and kept closed while engine is running.

BACKGROUND

[0001] In an ordinary engine, one end of said crank shaft is connected to said cam shaft on top of said cylinders by pulleys and timing belt. Along said cam shaft there are specially manufactured said rings corresponding each said engine valves, such that while said cam shaft is turning, one side of the said ring pushes the said valve to open, and the other side of the said ring let the valve close by a spring attached to the said valve. This system uses a portion of torque from the said crank shaft, generated by engine. On the other hand, said engine pistons are pushed down to provide half turn to said crank shaft by combustion of fuel inside said cylinders. After combustion, said a piston is pushed to its mechanical low limit, and while said piston is retracted by the help of other piston turning the said crank shaft exhaust gases within the cylinder forced out through said exhaust valve.

SUMMARY

[0002] In an ordinary systems, when said the piston within said the cylinder reaches to its low limit after combustion, produced gases within said the cylinder still has high pressure which is released to ambient and vested. On the other hand, this high pressure of produced gases has enough energy to push open said the intake and exhaust engine valves. In the new system, an opening said drive hole is located such that it becomes exposed to combustion area within said cylinder when said the piston reaches its mechanical low limit. Said drive hole routes the exhaust gases by said a pipe system to open said intake valve of prior said cylinder and said exhaust valve of its own. However, since each said cylinder opens its own said exhaust valve after combustion, the inner area of the valve should be much smaller than the outer area on which the pressure of exhaust gases applied in order to obtain higher force forward to open said exhaust valve. These said engine valves return to close position by the help of a spring attached to each said valve same as ordinary systems. This way the vested combustion energy would be in use. On the other hand, a portion of energy directly from the engine crank shaft to operate engine valves in an ordinary systems would be saved and therefore results in increase of engine performance. To start the engine, one additional intake valve and one additional exhaust valve are added to the first cylinder. These valves operated by starter motor at start-up of engine, and kept closed while engine is running. As an example, the stages of 4-Cylinder engine has been illustrated in FIG. 1, and start-up system in FIG. 1.

DRAWINGS

[0003]FIG. 1 The Engine Start-Up System.

[0004]FIG. 2 The Stages and Concept Design of 4-Cylinder Engine.

DESCRIPTION

[0005]FIG. 1 illustrates said the engine start-up system. Additional solenoid said intake and said exhaust valves are used to start the engine. These said solenoid valves are operated by said Start-up valves Controller according to the index data supplied from said Encoder attached to the said Crank Shaft. These additional said solenoid valves are kept closed all the time while engine running. FIG. 1 also shows said piston extension if necessary by design to ensure to keep close said the Drive Hole when said piston is on up position. FIG. 2 is an illustration of four stages of 4-Cylinder engine. Arrow lines shows said the pipe lines in which exhaust gasses flow and pressurize said the valves to open. When the said valves are opened by pressure, said gas release holes, just below said valve surface in closed position, are exposed inside the pipe line and these holes direct the exhaust gases to ambient decreasing the pressure, so valves are closed back by the help of a spring attached to each individual valve. In order to obtain a force to open the valves, said outer surface area which is inside the pipe line should be greater than said inner surface area which is inside the cylinder. In other words, the ratio of said outer surface area over said inner surface area should be greater than 1, depending on design parameters, how much force required to open the valve. Greater the ratio is greater the force applied to the valve, consequently lower the response time to open the valve. 

What claimed is:
 1. Said engine valves could be operated by the pressure of exhaust gases coming from said cylinders just after combustion. When said engine piston reaches its low limit within the cylinder, exhaust gas in the cylinder still has high pressure and energy to open said engine valve. This energy is vested in an ordinary systems on the next cycle by pushing the gas through exhaust.
 2. In an ordinary system, said engine crank shaft drives said cam shaft by timing belt to open the valves, and some of engine power is lost for this operation due to friction. On the other hand, the new operation system eliminates cam shaft, pulleys and timing belt, and consequently power loss due to friction, results in higher horse power.
 3. The new operation system provides very accurate timing to open the valves, therefore improve engine performance, and eliminates timing belt adjustment, maintenance and possibility of damage on said engine valves and pistons due to improper adjustments.
 4. The new operation system has low cost in manufacturing, both material and labor wise, therefore, overall engine cost reduces while efficiency increases. 